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Role of Pr/Ba disorder in Pr123 superconductor

Khosroabadi, H ; Sharif University of Technology | 2004

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  1. Type of Document: Article
  2. DOI: 10.1002/pssc.200304470
  3. Publisher: 2004
  4. Abstract:
  5. Polycrystalline (Pr1-x Bax)Ba2Cu 3O7-δ samples (0.0 ≤ x ≤ 0.6) is prepared by the standard solid state reaction technique. X-ray measurements confirm the formation of the 123 phase for x ≤ 0.3, but for 0.4 ≤ x ≤ 0.6, due to the solubility limit, the 123 phase is not a dominant phase. Resistivity measurements show the increasing of resistivity with the increase of Ba-doping up to about x=0.08, and then decreases in the 123 phase up to x = 0.3. There is no observation of superconducting state in our samples, but we observe the sharp decrease of resistivity for x>0.1, which is related to possible superconductivity in Pr123 system by Ba-doping. It is concluded that the Pr/Ba disorder has important effect in the transport electrical properties, specially occuring a superconducting state in Pr123. It is also suggested that extra Ba concentration in Pr123 system can create superconducting state such as in Ca-doped Pr123. © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
  6. Keywords:
  7. Charge carriers ; X ray diffraction analysis ; Solubility ; Polycrystalline materials ; Phase transitions ; Doping (additives)
  8. Source: Physica Status Solidi C: Conferences ; Volume 1, Issue 7 , 2004 , Pages 1867-1870 ; 16101634 (ISSN)
  9. URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/pssc.200304470